VIDEO: Kendall Jenner and Gigi Hadid Dancing With the Backstreet Boys Is SO CUTE!

It's hard to pick a "greatest moment" from the Balmain x H&M fashion show. First, there were the amazing dancers who stomped and vogued their way around the two-story venue in downtown New York's financial district. Then there were the models — from Kendall Jenner and Karlie Kloss to Joan Smalls, Gigi Hadid, and Jourdan Dunn, every major runway star was in attendance and strutting like her life depended on it.

And let's not forget the clothes themselves, which looked shockingly high-end and luxurious up-close and in person on the runway. They looked so good, in fact, that even the usually jaded fashion crowd sitting front row could be heard saying things like "Wow!" "How the hell did they do that?" and, "I need that now!"

Then, just when it seemed like the show was over, out came the Backstreet Boys performing "Everybody (Backstreet's Back)." As they made their way down the stairs to the main stage, the usually reserved and too-cool-for-fun fashion crowd jumped up and literally ran across the runway to the balconies overlooking the stage. The massive crowd of models, celebrities, and fashion editors on both floors then proceeded to dance and sing along as Brian, Nick, A.J., Kevin, and Howie took everyone back in time to the late '90s. It was, in a word, magical.

But even with all the great, wonderful, fun things going on, perhaps the cutest thing of all was the guys walked down to the front of the stage to sing and dance to "I Want It That Way" with Kendall and Gigi. Check it out below and try not to smile at how adorably they (and everyone else) are fangirling out, I dare you!

All in all, it was pretty much the best fashion event of the year. If only fashion could always be this fun, exciting, and just downright awesome.

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